EMBARGOED For Release 2:00 p.m., EDT, Thursday, May 10, 2007
Graphics: "Missing Mass" in Dwarf Galaxies
Images from computer simulation of the collision of NGC 5291 with
another galaxy 360 million years ago. Numbers are millions of
years, with the collision time as zero. This simulation shows
the collision causing material from the spiral galaxy to be ejected
outward into a ring-like structure similar to that seen in the
telescopic images below. The recycled dwarf galaxies are the
red-purple objects in the ejected material.
Left: Composite radio/optical/ultraviolet image of NGC 5291 and its
surroundings, including the debris propelled outward by collision
with another galaxy. Blue is atomic Hydrogen observed with the VLA;
white is optical; red is ultraviolet (Galex satellite). Red labels
mark the dwarf galaxies studied in this research.
Composite multiwavelength image without labels.
MOVIE of computer-simulated galaxy collision.
Friday, 04-May-2007 17:26:51 EDT